Home / 20,389.12-30,600.96-8,085.76

Finding the Fourth Proportional to 20,389.12, 30,600.96 and 8,085.76

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Solution

The fourth proportional to 20,389.12, 30,600.96 and 8,085.76 is: 12,135.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.12 : 30,600.96 = 8,085.76 : x
  2. Step 2: Convert to fraction form
    20,389.12/30,600.96 = 8,085.76/x
  3. Step 3: Cross multiply
    20,389.12x = 30,600.96 × 8,085.76
  4. Step 4: Simplify right side
    20,389.12x = 247,432,018.33
  5. Step 5: Solve for x
    x = 247,432,018.33/20,389.12
  6. Step 6: Final answer
    x = 12,135.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.